Sawing apparatus



Dec. 18, 1934- J. WEISSMAN ET AL 1,984,508

SAWING APPARATUS Filed Dec. 21, 1932 a A TTORNEY Patented Dec. 18, 1934 Mr ear :orric-E sAvviNojAPrAnnTUs Jack Weissman andliiyman Zaretzky, Bronx,

ApplicationiDecember21, 19.32, SerialNo. 648,252 6 Claims. (Cl. 144--83) v, This invention relates to sawing apparatus, and is particularly directed to a machine forcutting grooves for egiample, in a door and door jar-1b, ;for receiving door hinges, of the type shownin g the patent to Ernest Flagg, No. 1,479,705 issued January 1st, 1924, and the like devices.

. Heretofore, in. mounting hinges of the type shown in the aforesaid patent, it has been custernary to place an angle-shaped templet on .a corner of a door jamb, having guide portions therein forreceiving a cutting tool and a drill to form a groove in the door jamb communicating with a tubular opening, into which may be inserted one of a pair of hinged members having a'fiat portion received in said groove, and a cylindrical portion received in said tubular opening. {The same operation was repeated on the door. This method of preparing the door'and door jarnb for the reception of the complementary hinged parts has been found to beobjectionable in that the groove cutting operation was difficult and slow.

' It is therefore, an object of my invention to provide means for overcoming. these difficulties,

ously, quickly and easily cutting grooves in the door and door jamb without the use of'a templet, thus greatly reducing the time necessary for the operation and increasing the accuracy of the groove.

Afurther object of my invention is toprovide a neat, rugged and compact machine of the character described, which shall comprise comparatively few and simple parts, berelatively inexpensive to manufacturaeasy to assemble and manipulate; and yet practical, accurate and efficient to a high degree.

Other objects of this invention will in part be obviousyand in part hereinafter pointed out.

"Theinvention accordingly consists in the fea- *tures of construction, combinations of elements,.

lFig. leis a horizontal sectionithroughra door d jamb provided with grooves adapted to ;be out withmvimproved sawing device and receiving. complementary hingetparts;

.Fig. 2 is aperspective view ofa door jamb providedwith a groove and tubular openingadapted .tah u withmv m o ed ap aratu said means comprising a'machine for simultane- .Fig. 3 is a perspective view takencn line 33 of Fig. 4=;

Fig. 1 is a sideelevational view ofa sawing machine embodying the invention;

Fig. 5 is a cross-sectional view taken on line 5--5 of Fig. 4; I

; Fig. 6 is a side elevational view of a .machine embodying the invention and illustrating a modifled construction;

Fig. 7 is a cross-sectional viewtaken online 7'? of Fig. 6;

Fig. 8 is a horizontal, sectional view of a door jamb and a templet device for use in drilling a tubular opening in the door j amb after the groove has been formed therein; and

Fig. 9 is a perspective view of the templet shown in Fig. 9.

Referring now in detail to the drawing, 10 designates a door and 11 designates a doorjamb, each provided with a horizontal groovel2 communia eating with a tubular opening 14. Thetubular openings 14 are parallel tothe frontsurfaces l5 of the door anddoor jamb andformed in the adjacent surfaces 16 of said door and doorjamb. Received within each groove 12 and opening l is a hinge part 17. The hinge parts may be of the generaltype describedin the aforesaidvP atent No. 1,479,705,.each of said parts beingprovided with a flat portion extending within the groove12,

and a cylindrical portion extending within the opening it. v

Heretofore in cutting the door and door jarnb to provide the grooves 12 and the openingsla, it was customary to place an angular templet against the door jamb l1 contacting the surfaces 15 and 16 thereof and having a slotguide. portion for receiving a cutting implement to cut the groove and a tubular slot portion to receive a drill to out the tubular opening 14. Thereafter the templet was placed on the door 10 andthe operation repeated for cutting the groove and the tubular opening in the latter. It has been found that this process requires considerable time and entails diinculty in cutting the grooves. The machine 20 shown in Figs. 3, 4, and 5, em-

bodying the invention, is adapted to accurately cut the grooves 12 in both the door and'door jamb simultaneously, as will appear hereinafter.

The machine 20 comprises a plate 21 formed with an elongated slot 22. Attached to said plate 21 adjacentthe opposite edges 23 thereof are a pair of similar, symmetricallydisposed members 24 having aligned outwardly extending projectionsI2 5 formed with aligned slots 26. Received within each slot 26 is a thin plate 27 releasably of rods 30 and extending toward the plate 21.

fixed to the projection by means of a collar or clamp 28 receiving said projection and provided with set screws 28a pressing on opposite sides of the slotted portion 25. It will be noted that the members 27 are in the same plane and perpendicular to plate 21 and slot 22. The members 24 are further formed with spaced, inwardly projecting portions 29 and fixed to each pair of portions 29 in any suitable manner, is a pair of rods 30 perpendicular to the plate 21. It will thus be noted that there are two pair of spaced rods 30 fixed to the members 29 and to the plate 21." Attached to the outer ends of each pair of rods 30, as for example by means of nuts 32; is a cross member 31, having a hooked portion 33, for the purpose hereinafter appearing.

Slidably mounted on the rods 30 is a bracket 35 comprising a rear plate 36 parallel to the plate 21 and formed with two pairs of tubular through openings slidably receiving the rods 30 therethrough. Attached to said plate 36 adjacent each end thereof, is a wall 38 received between a pair It will thus be seen that there are two parallel walls 38, the front ends of said walls being interconnected by a transverse fixed shaft 40. An intermediate wall 41 may interconnect the walls 38,

said wall 41 being disposed parallel to the plate 36 and to the shaft and being formed with a central opening 43, for the purpose hereinafter stated.

Attached to the front ends of the walls 38 are hooked members 44. Coil tension springs 45 are attached at the outer ends thereof to the hooked portions 33 and 34, respectively, for normally pulling the frame or bracket 35 rearwardly into contact with the nuts 32 at the rear of the rods 30. I

It will be noted, however, that the frame 35 may be pushed toward the front plate 21 to tension the springs 45. Rotatably mounted on the shaft 40 is a sleeve 4'7 to which there is fixed a bevel gear 48 adjacent one end thereof, and a pair of spaced, parallel circular saw members 49 adjacent the other end thereof, aligned with the slot 22 in the plate 21. The rear plate 36 is formed with a through opening 50 aligned with the opening 43 and journaled within said openings is a shaft 52 parallel to the rods 30 and provided with suitable shoulder members 53 to retain said shaft against sliding movement with respect to the frame 35. Attached to the front end of said shaft 52 is a bevel gear 55 meshing with the gear 48 and disposed between the latter gear and the circular saw members'49.

The operation of the device will now be understood. The door may be placed and held in any suitable manner, against the door jamb with the edge 16 of the door substantially lying against the adjacent surface 16 of the door jamb, and the front surface 15 of said door aligned or co-planer with the front surface of the door jamb. Any suitable rotary device 57, such as an electric portable drill motor, not shown in detail, may be attached tothe rear end 58 of the shaft 52 for rotating said shaft. The device 20 may then be placed against the surfaces 15 of the door and door jamb with the thinned members 27 inserted in the slit 59 between the adjacent surfaces 16. The machine 20 may then be moved up or down to the proper height and the motor or other rotary device 57 started for rotating the shaft 52,

' and hence-causing rotation of the saw members 49. It will be noted that the saw members 49 are in horizontal planes and by moving the machine 20'to the proper height, the saw members may be located at the height at which it is desired to form the grooves 12. The circular saw members 49 are spaced apart a distance equal to the thickness of the groove 12. It will now be understood that upon rotating the shaft 52 and pressing forwardly on the rear of said shaft, the entire bracket or frame 35 will be moved forwardly toward the plate 21 to move the saw blades 49 partialy through the opening or slot 22 in said plate 21 for cutting intothe door and door jamb and tensioning the springs 45. Ohviously the frame 35 is pushed forwardly any desired distance depending upon the depth of the groove 12 to be formed. Upon releasing pressure from the rear of the shaft 52, the springs 45 will automatically retract the bracket 35 and the machine may then be removed. The wood between the two saw cuts may then be easily chiselled out to form a pair of aligned grooves 12 in the door and door jamb, respectively.

Thereafter, a templet or guide plate 60 may be used to facilitate drilling of the tubular opening 14. To this end, the templet 60 comprises a plate portion 61 adapted to contact the surface 15 of the door jamb 10, for example, and a plate portion 62 adapted to contact the surface 16 of said door jamb. The plate portions 61 and 62 are disposed at right angles to one another and attached to the inner surfaces of said plate portions at the junction thereof, is a projection disposed in a plane at right angles to said plate portions and adapted to be received within the groove 12 formed between the circular saw members 49.

Extending from the plate portion 62 of the member 60 is a tubular portion 63 having a through opening 64 adapted to receive a drill 66 in proper position for drilling the opening 14 in the surface 16 of the door jamb. Of course, the groove '12 and opening 14 may be finished after they have been cut in the manner described above.

If desired, the plates 27 may be omitted to permit sidewise movement of machine 20 to form an elongated instead of a curved groove. Furthermore, a groove 12 may be cut either in the door only or in the door jamb only.

In Figs. 6 and 7 of the drawing, there is shown a machine 20a embodying the invention but illustrating a modified construction. Said machine 20a comprises a plate 21a formed with a central 1 slot 22a. [Attached to the plate 21 are a pair of aligned, thinned plates 27a disposed in a common plane perpendicular to the plane of the plate 21a and perpendicular to the slot 22a. There is further fixed to said plate 21a three rearwardly extending parallel rods 30a On which there is slidably mounted a bracket 35a. Said bracket may comprise a wall 70 perpendicular to the slots 22a. and to the plate 21a and provided with two pair of parallel arms 71 extending in one direction and having openings therein receiving a pair of said rods 30a therethrough. Extending from the plate 70 in an opposite direction is a pair of aligned projections 74 having aligned openings receiving the other rod 30a therethrough. Attached to each of the rods 30a and between a pair of arms '71 or '74 is a pin 75 and received on each rod'30 between one of the pins 75 and one of the arms 'llor '74, is a coil compression spring 76.

Interconnecting the lower pair of arms 71 is a shaft 77011 which is slidably mounted a sleeve '78 to which there is fixed a beveled gear 79 and a pair of spaced, circular saw members 49a aligned with said slot 22a. Journaledin oppo- CJi sitely aligned openings in a pair of front and rear arms '71 for rotation, is a shaft 52a parallel to rods 30 and having a bevel gear 5511 on the front end thereof meshing with the beveled gear 79.

The operation of the machine 20a will now be understood. The machine may be placed against the door and door jamb in the manner similar to the machine 20 and the shaft 52 caused to rotate by any suitable motor or other rotary device. Upon pressing against the rear end of the shaft 52a the bracket 35a will be moved toward the plate 20 and the saw blades 49a will rotate for cutting a pair of grooves 12 simultaneously in the door and door jamb. During this operation the springs 76 will be compressed. Upon releasing pressure on the shaft 52 the springs 76 will cause the bracket to be retracted rearwardly, the pins 75 contacting a pair of aligned arms 71 for limiting rearward movement of said bracket.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made of the embodiments set forth, it is to be understood that all matter herein contained, or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A machine of the character described 001 prising a plate having an opening, a guide member attached to said plate and extending rearwardly therefrom, a bracket slidably mounted on said guide member and movable toward and away from said plate, a pair of spaced, circular saws rotatably mounted on said bracket and adapted to be moved through said opening, means on said bracket for rotating said saws, and a spring interconnecting said bracket with said guide member for retracting said bracket.

2. A machine of the character described comprising a member having a plate portion adapted to be placed against a door and door jamb, and a thin plate portion disposed at right angles to the first plate portion and adapted to be received between said door and door jamb, a bracket slidably mounted on said member, and a rotary cutting implement rotatably mounted on said bracket, said first plate portion being formed with a slot perpendicular to the second plate portion and adapted to receive said cutting implement upon moving said bracket toward said first plate portion.

3. A machine comprising a plate, a member fixed to said plate and extending rearwardly therefrom, a bracket slidably mounted on said member and movable toward and away from said plate, a shaft fixed to said bracket and disposed parallel to said plate, a sleeve rotatably mounted on said shaft, a bevel gear on said sleeve, and a pair of spaced, circular saws, on said sleeve, and a shaft rotatably mounted on said bracket disposed perpendicular to said first shaft and having a bevel gear thereon meshing with said first bevel gear, said plate having a slot for partially receiving said circular saws upon moving said bracket toward said plate.

4. A machine comprising a plate, a member fixed to said plate and extending rearwardly therefrom, a bracket slidably mounted on said member and movable toward and away from said plate, a shaft fixed to said bracket and disposed parallel to said plate, a sleeve rotatably mounted on said shaft, a bevel gear on said sleeve, and a pair of spaced, circular saws, on said sleeve, a shaft rotatably mounted on said bracket disposed perpendicular to said first shaft and having a bevel gear thereon meshing with said first bevel gear, said plate having a slot for partially receiving said circular saws upon moving said bracket toward said plate, and means for retracting said bracket.

5. A machine comprising a plate, a pair of parallel members fixed to said plate and extending rearwardly therefrom, a bracket slidably mounted on and between said pair of members and movable toward and away from said plate, a shaft fixed to said bracket, a sleeve rotatably mounted on said shaft and having a bevel gear and a pair of spaced circular saws, a shaft rotatably mounted on said bracket disposed perpendicular to the first shaft and having a bevel gear thereon meshing with said first bevel gear, said plate having a slot for partially receiving said circular saws upon moving said bracket toward said plate, and a thin member fixed to said plate and disposed in a plane perpendicular to said plate and to said slot and adapted to be received between a door and door jamb.

6. A machine of the character described comprising a member having a plate portion adapted to be placed against a door and door jamb, and a thin plate portion attached to and disposed at right angles to the first plate portion and adapted to be received between said door and door jamb, a bracket slidably mounted on said member, a rotary cutting implement rotatably mounted on said bracket, and disposed in a plane perpendicular to the plane of said first plate portion and said thin plate portion.

JACK WEISSMAN. HYMAN ZARETZKY. 

